Products / Controllers

PMD401 Controller


  • Nanometer resolution
  • Closed loop control
  • Open loop mode
  • Servo mode
  • Stackable boards for multi-axis
  • Small form factor
  • Slave amplifier to external motion controller via SPI interface
  • Sub-nanometer resolution to the Piezo LEGS® motor
  • General-purpose inputs/outputs – maximum 4 in and 3 out

Technical documentation



Type Value Note
Number of axes 1
Multi-axis support Yes Units can be RS485-chained for multi-axis
True speed control No Only stepping rate controlled
Resolution 8192 microsteps Each full step of about 5 μm is divided into 8192 steps
Maximum stepping rate

(Full step frequency – Hz)

1500 Depends on motor
Supported encoders Quadrature ABZ, 20 MHz counting
SSI 8–30 bits, 330 or 130 kbps
BiSS 18/26/32 bits, 330 kbps
Host communication Two-wire RS485 Commands are sent in ASCII format, 115.2 kbps (n81)
Servo interface SPI 16 bits (signed), max 15 Mbps
General I/O 4 in Depending on encoder type and use of limit switches
3 out
Stacking connector 6-pole, ERNI MicroStac 114711 GND, 48 V, RS485
Motor connector 5-pole, JST SM05B-SRSS-TB Two connectors, parallel connection
Encoder/servo connector 6-pole, JST SM06B-SRSS-TB Input for sensors or SPI servo interface
Limit switch Yes Input for external limit switches
Communication connector 3-pole, JST SM03B-SRSS-TB Input for RS485, or use stacking connector
Power connector 2-pole, JST SM02B-SRSS-TB Input for 48 V supply, or use stacking connector
Power supply 48 V DC, 5 W 48 V DC ±5%
Dimensions 59 x 39 x 9.2mm



Version Data sheets CAD files
PMD401 PMD401 data sheet 3D-CAD-filesPMD401(Zip)
PMD401 User Manual